package demo;

public class Demo09 {
public static void main(String[] args){
    String s1 = "hello java";
    String s2 = "hello java";

    if (s1.equals(s2)){
        String news1 = s1.replace(" ","");
        System.out.println(news1);
        String newseRes=news1.replace("java","word");
        System.out.println(newseRes);
    }

}
}
